Goodwill and Intangible Assets - Additional Information (Detail) $ in Thousands |
9 Months Ended | |
|---|---|---|
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Sep. 30, 2017
USD ($)
Store
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Dec. 31, 2016
USD ($)
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| Finite-Lived Intangible Assets [Line Items] | ||
| Goodwill | $ 526,918 | $ 472,437 |
| Goodwill allocated to current year acquisition | 60,000 | |
| Goodwill reduced for disposition of dealership | 4,600 | |
| Net of accumulated impairment losses | $ 797,600 | 796,700 |
| Number of stand-alone pre-owned stores | Store | 2 | |
| Lease Agreements [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Definite life intangibles | $ 4,900 | 5,300 |
| Stand-alone Pre-owned Stores [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Impairment of goodwill | 900 | |
| Franchise Assets [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Franchise assets | 73,500 | $ 74,900 |
| Franchise assets reduced for disposition of dealership | $ 1,400 |
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- Definition Number of stand-alone preowned stores. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill. No definition available.
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